#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
using namespace std;
const int maxn = 1e5+10;
char s[maxn];
int main()
{
	int n;
	while(scanf("%d",&n)!=EOF)
	{
		scanf("%s",s);
		int numl = 0;
		int numr = 0;
		for(int i = 0;i<n;i++)
		{
			if(s[i]=='L')numl++;
			else numr++;
		}
		printf("%d\n",numl+numr+1);
	}
} 
